Guitar Hero 3 All New Features Provide Unparalleled Social Gaming Experience!! Guitar Battle – Face off against a friend offline or online with the new features allowing you to attack your competitor by breaking their string or forcing them to play lefty Co-op Career – Play through your career with a friend in this new party mode Online – Challenge a friend or play with them online in Pro Face-Off, Co-op, or Guitar Battle Mode Social Networking Website – Form groups and compete for rewards and bragging rights in the official Guitar Hero community